Account not in this store

Dear,

I moved from US to the India while ago, I switched my phone to the India Store. In my mac, whatsapp is not working and asking me to update to the latest version. When I try getting error "Account not in this store", your account is not valid for use in the U.S. store. you must switch to the India store before purchasing.

I changed country in my Mac itunes, still getting the same error even if I try to download any of the app.

Please help me for that